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Product attributes Property Value
Manufacturer ETEK MICROELECTRONICS
Product Series ET553XX
Packaging Tape & Reel (TR) |
Output Configuration Positive
Output Type Fixed
Number of Regulators 1
Voltage - Input (Max) 5.5V
Voltage - Output (Min/Fixed) 2.8V
Voltage - Output (Max) -
Voltage Dropout (Max) 0.4V @ 500mA
Current - Output 500mA
Current - Quiescent (Iq) 85 µA
Current - Supply (Max) -
PSRR 80dB (1kHz)
Control Features Enable
Protection Features Over Current, Over Temperature
Operating Temperature -40°C ~ 85°C (TA)
Grade -
Qualification -
Mounting Type Surface Mount
Package / Case SC-74A, SOT-753
Supplier Device Package SOT-23-5
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The ET55328B is a high-performance LDO linear voltage regulator from ETEK MICROELECTRONICS, offering a fixed 2.8V output and a maximum current of 500mA. It features a low quiescent current of 85 µA and an excellent PSRR of 80dB at 1kHz, making it suitable for noise-sensitive applications. The device is available in a compact SOT-23-5 package, balancing performance and size.

  • High Ripple Rejection: The 80dB PSRR at 1kHz ensures superior noise filtering for sensitive analog and RF circuits.
  • Low Dropout Voltage: A dropout of just 0.4V at 500mA maximizes efficiency and allows operation from lower input voltages.
  • High Output Current: Capable of supplying 500mA, making it versatile for a wide range of applications.
  • Low Quiescent Current: The 85 µA quiescent current helps maintain high efficiency even at light loads.

High-Performance Portable Devices

The ET55328B's 500mA output and low 0.4V dropout make it ideal for powering processors and peripherals in high-performance portable devices.

Noise-Sensitive RF Circuits

With 80dB PSRR at 1kHz, this LDO ensures clean, stable power for RF transceivers, reducing interference and improving signal quality.

Digital Cameras and Imaging Systems

It provides a stable 2.8V rail for image sensors and DSPs, ensuring consistent performance in varying lighting and load conditions.

GPS and Navigation Modules

The high PSRR helps maintain the sensitivity of GPS receivers by filtering out power supply noise that could degrade positioning accuracy.

Industrial Sensors and Actuators

Its robust 500mA current capability and low dropout make it suitable for powering industrial control interfaces and sensor arrays.

Networking Equipment

For routers and switches, this regulator provides a reliable 2.8V supply for PHY chips and other communication ICs.

Q: What is the output voltage of the ET55328B?
A: The ET55328B provides a fixed output voltage of 2.8V.
Q: What is the maximum output current?
A: It can deliver up to 500mA of output current.
Q: What is the input voltage range?
A: The input voltage range is not specified in the provided data; please refer to the official datasheet.
Q: What is the dropout voltage?
A: The dropout voltage is 0.4V at a 500mA load.
Q: What is the quiescent current?
A: The quiescent current is a low 85 µA.
Q: What package is the ET55328B available in?
A: It is available in the compact SOT-23-5 package.
Base Product Number : ET55328B
2.8V 500mA ETEK MICROELECTRONICS High PSRR LDO Linear Regulator Low Quiescent Current SOT-23-5
Q: What is the output voltage of the ET55328B?
A: The ET55328B provides a fixed output voltage of 2.8V.
Q: What is the maximum output current?
A: It can deliver up to 500mA of output current.
Q: What is the input voltage range?
A: The input voltage range is not specified in the provided data; please refer to the official datasheet.
Q: What is the dropout voltage?
A: The dropout voltage is 0.4V at a 500mA load.
Q: What is the quiescent current?
A: The quiescent current is a low 85 µA.
Q: What package is the ET55328B available in?
A: It is available in the compact SOT-23-5 package.